/Engine/Plugins/MeshPainting/Source/MeshPaintingToolset/Public/MeshPaintHelpers.h
Sets all vertex colors for a specific LOD level in the SkeletalMesh to FillColor
void SetColorDataForLOD ( [USkeletalMesh](API\Runtime\Engine\Engine\USkeletalMesh) * SkeletalMesh, int32 LODIndex, const [FColor](API\Runtime\Core\Math\FColor) FillColor, const [FColor](API\Runtime\Core\Math\FColor) MaskColor )